查询词典 amino-isovalerianic acid

In order to check the corresponding compound at 31P NMR –45.4 ppm, stable pentacoordinate spirobicyclic 2-phenoxy-1,3-phenylene-dioxo-1,3,2-iminoacetoxyphosphoranes were synthesized through a new and efficient method whereby phosphorus pentachloride was displaced stepwise by catechol, N,O-bisamino acid and phenol, or catechol, phenol and N,O-bisamino acid, their 31P NMR chemical shifts are at about 31P NMR –45.0 ppm, the results showed that the compound 4 at 31P NMR –45.4 ppm was pentacoordinate phosphorane containing amino acid residue.

采用磷谱跟踪来研究上述成肽反应机理。例如在氮气保护下，0.1mmol O，O-亚苯基磷酰氯（1）和0.15mmol N，O-二苯丙氨酸（2）苯溶液加入0.6ml核磁管中，混合均匀，反应过程用磷谱检测。反应1分钟后，起始原料1(δp=19ppm)很快转变成N-磷酰苯丙氨酸的三甲基硅基酯（3）(δp=19.8ppm)，在8分钟内，3完全转变成苯丙氨酸磷烷4(δp =-45.4ppm)，同时出现环磷三酯（6）(δp=3.5ppm)。随着反应的进行，对应于化合物4的峰逐渐变小，而6逐渐变大。

Catalyst system of phosphotungstic acid and tartaric acid or phosphotungstic acid and 4-amino-antipyrine can be reused five times and the yield was still 93.1% and 80.6%, respectively.

磷钨酸－酒石酸钾钠和磷钨酸－4-氨基安替比林催化体系重复使用5次后，产率仍分别达到87.1%和80.6%。

Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1, 3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts were synthesized. Then dual-functionalized ionic liquids containing both hydroxyl and sulfonyl functional groups were produced successfully by zwitterionic salts and three kinds of strong acids (p-toluene sulfonic acid, trifluoromethanesulfonic acid, methanesulfonic acid) respectively. The structure of zwitterionic salts and dual-functional ionic liquids were confirmed by the 1H NMR and IR.

以羟基有机胺(N，N-二甲基乙醇胺，三乙醇胺)为原料与1，3-磺酸内酯反应合成了一系列含有羟基和磺酸基双官能团的内盐，并将所得到的内盐分别与三种强酸(对甲苯磺酸，三氟磺酸，甲磺酸)反应，成功地合成了双功能化室温离子液体，并通过红外光谱、核磁氢谱测定，证实了内盐和双功能化离子液体的结构。

We also found some distinctive metabolism regulation of sulphur amino acid,aminoglutaminic acid and protein in the gene transcription changes following by the addition of taurocholic acid to the minimal medium.

并掌握了在添加牛磺胆酸刺激的情况下，副溶血弧菌在蛋白质、含硫氨基酸和谷氨酸等代谢方面的规律。

Through a variety of resin filter, adsorption and elution conditions for the optimization, as well as decolorization, crystallization methods of research, this article eventually determine the strong acid cation resin HZ-001 which is at pH 3, 3BV / h, having the largest adsorption to the tryptophan; the fermentation broth were centrifuged to remove sediment,then treated with activated carbon to be decolored and then treated with strong acid cation resin HZ-001. After that,2mol/l amino acid were passed through the HZ-001 ion exchanging column,kept almost constants when the flow rate stayed 6 BV / h. At 60℃,it was condensed into the saturated state and then added Ethanol until its percentage reaching 30%. At 4 ℃ under 100rpm placed in the shaker 20h, the collection of L-tryptophan was dried up in vacuo.

本文通过对种树脂的筛选、吸附和洗脱条件的优化，以及对脱色、结晶方法的研究与摸索，最终确定强酸型阳离子树脂HZ-001在pH=3，3倍床体积流速，温度室温，对色氨酸有最大的吸附作用；将发酵液离心去沉淀并用活性炭脱色后通过HZ-001强酸型阳离子交换树脂柱，再用2mol/L的氨水6倍床体积流速在室温下进行洗脱，收集洗脱液，60℃浓缩为过饱和状态后加入30%无水乙醇，4℃下100rpm摇起晶20h，过滤搜集结晶并真空干燥得白色粉片状L-色氨酸晶体。

Zhao'an County Hongxing Township, located in the province south gate of Zhao'an County, north-east, is a typical subtropical climate, mild climate, abundant rainfall, where its fruit Plum Red Star produced large, thin, flesh, nuclear small, medium acidity containing abundant citric acid, tannic acid, malic acid, and the human body needs a variety of amino acids rather than the products of other origin.

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Unsaturated fatty acidcontents of fat were 64.80%,fatty chemical Characteristic : iodin value 70.86 ,acid value 0.4933 ,saponification number 195.34 ,The conclusion indicated that the raised Landaise geese had better animal meat material,concluding: abundant flavor substance and essential amino acid,lower fat content and higher Unsaturated fatty acid.

脂肪中不饱和脂肪酸含量高达64.80%，脂肪酸碘价70.86 ，酸价0.4933，皂化价195.34。由此可知：朗德鹅具有较好的肉用性能，尤其是朗德鹅肌肉富含风味物质、必需氨基酸和大量的不饱和脂肪酸，是人类较好的动物肉食原料。中图分类号： TS201.2 ； TS251.1 文献标识码： A

Result:The levels of plasma dopamine, amino acid ( glutamic acid and aspartic acid ) in the children with TS were higher than those of normal children.

我们对48例TS患儿的血浆多巴胺、游离性兴奋性氨基酸中谷氨酸和门冬氨酸水平进行观察，并

If we want to make it drugs, less 1-2 amino acids would cost a great difference, and the fewer number of amino acid synthesis more easily, for 3 years or access to clinical.

要想把它做成药物，少1到2个氨基酸都会在成本上有很大差别，并且氨基酸数越少越容易合成，争取在3年左右能够进入临床。

Two amino acid molecules associate in a side-by-side manner. Interactions involving hydroxyl group and apolar alkyl groups side-chains are significant in the pairwise association of amino acids.

氨基酸两分子间的结合主要是一种肩并肩的偶极吸引作用，羟基、非极性侧基均会参与相互作用。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。